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Message-ID: <156284552510181@kroah.com>
Date: Thu, 11 Jul 2019 13:45:25 +0200
From: <gregkh@...uxfoundation.org>
To: bp@...en8.de,fweimer@...hat.com,gregkh@...uxfoundation.org,jannh@...gle.com,keescook@...omium.org,kernel-hardening@...ts.openwall.com,luto@...nel.org,peterz@...radead.org,tglx@...utronix.de
Cc: <stable-commits@...r.kernel.org>
Subject: Patch "Documentation/admin: Remove the vsyscall=native documentation" has been added to the 4.19-stable tree
This is a note to let you know that I've just added the patch titled
Documentation/admin: Remove the vsyscall=native documentation
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
documentation-admin-remove-the-vsyscall-native-documentation.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@...r.kernel.org> know about it.
>From d974ffcfb7447db5f29a4b662a3eaf99a4e1109e Mon Sep 17 00:00:00 2001
From: Andy Lutomirski <luto@...nel.org>
Date: Wed, 26 Jun 2019 21:45:02 -0700
Subject: Documentation/admin: Remove the vsyscall=native documentation
From: Andy Lutomirski <luto@...nel.org>
commit d974ffcfb7447db5f29a4b662a3eaf99a4e1109e upstream.
The vsyscall=native feature is gone -- remove the docs.
Fixes: 076ca272a14c ("x86/vsyscall/64: Drop "native" vsyscalls")
Signed-off-by: Andy Lutomirski <luto@...nel.org>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Kees Cook <keescook@...omium.org>
Cc: Florian Weimer <fweimer@...hat.com>
Cc: Jann Horn <jannh@...gle.com>
Cc: stable@...r.kernel.org
Cc: Borislav Petkov <bp@...en8.de>
Cc: Kernel Hardening <kernel-hardening@...ts.openwall.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: https://lkml.kernel.org/r/d77c7105eb4c57c1a95a95b6a5b8ba194a18e764.1561610354.git.luto@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
Documentation/admin-guide/kernel-parameters.txt | 6 ------
1 file changed, 6 deletions(-)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -4976,12 +4976,6 @@
emulate [default] Vsyscalls turn into traps and are
emulated reasonably safely.
- native Vsyscalls are native syscall instructions.
- This is a little bit faster than trapping
- and makes a few dynamic recompilers work
- better than they would in emulation mode.
- It also makes exploits much easier to write.
-
none Vsyscalls don't work at all. This makes
them quite hard to use for exploits but
might break your system.
Patches currently in stable-queue which might be from luto@...nel.org are
queue-4.19/documentation-admin-remove-the-vsyscall-native-documentation.patch
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